Abstract
Ultrafine beryllium (Be) powder of high purity was successfully synthesized by the pyrolysis of high-purity di-t-butylberyllium etherate (t-Bu2Be·Et2O) in elevated solvent. Scanning electron microscopy (SEM) shows that the powder is near-spherical. The most probable size of Be powder slightly decreases from 1.8μm to 1.2μm when the pyrolysis temperature increases from 202°C to 214°C and obviously decreases to 0.4μm as further increases to 230°C. X-ray diffraction (XRD) indicates that the powder has a single phase of α-Be with average crystallite size of 19.8nm–21.5nm. The total content of metal impurities in the powder is 6.8ppm–94.0ppm by inductively coupled plasma (ICP) determination.
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